package com.sky.aspect;

import com.sky.annotation.AutoFill;

import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut() {}

    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        log.info("AOP...");
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        //获取被拦截方法的数据库操作类型
        OperationType operationType = autoFill.value();

        //获取被拦截的方法的参数
        Object[] objects = joinPoint.getArgs();
        Object entity = objects[0];
        Method setCreateTime = entity.getClass().getMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
        Method setUpdateTime = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
        Method setCreateUser = entity.getClass().getMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
        Method setUpdateUser = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

        LocalDateTime now = LocalDateTime.now();
        Long id = BaseContext.getCurrentId();

        if(operationType == OperationType.INSERT) {
            setCreateTime.invoke(entity, now);
            setUpdateTime.invoke(entity, now);
            setCreateUser.invoke(entity, id);
            setUpdateUser.invoke(entity, id);
        }
        else if(operationType == OperationType.UPDATE) {
            setUpdateTime.invoke(entity, now);
            setUpdateUser.invoke(entity, id);
        }
    }
}
